27991356840

Names of 27991356840

• Cardinal: 27991356840 can be written as Twenty-seven billion, nine hundred ninety-one million, three hundred fifty-six thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.799135684 × 10¹⁰

Factors of 27991356840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 21406

Divisors of 27991356840

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 90 108 120 135 180 216 270 360 540 1080 1289 2578 3867 5156 6445 7734 10312 11601 12890 15468 19335 20107 23202 25780 30936 34803 38670 40214 46404 51560 58005 60321 69606 77340 80428 92808 100535 116010 120642 139212 154680 160856 174015 180963 201070 232020 241284 278424 301605 348030 361926 402140 464040 482568 542889 603210 696060 723852 804280 904815 1085778 1206420 1392120 1447704 1809630 2171556 2412840 2714445 3619260 4343112 5428890 7238520 10857780 21715560 25917923 51835846 77753769 103671692 129589615 155507538 207343384 233261307 259179230 311015076 388768845 466522614 518358460 622030152 699783921 777537690 933045228 1036716920 1166306535 1399567842 1555075380 1866090456 2332613070 2799135684 3110150760 3498919605 4665226140 5598271368 6997839210 9330452280 13995678420 27991356840
• Sum of all divisors σ(n): 93381552000
• Sum of proper divisors (its aliquot sum) s(n): 65390195160
• 27991356840 is an abundant number, because the sum of its proper divisors (65390195160) is greater than itself. Its abundance is 37398838320

Bases of 27991356840

• Binary: 11010000100011010100011010110101000₂
• Hexadecimal: 0x6846A35A8
• Base-36: CUXBX60

Squares and roots of 27991356840

• 27991356840 squared (27991356840²) is 783516057744214785600
• 27991356840 cubed (27991356840³) is 21931677562188361509333693504000
• The square root of 27991356840 is 167306.1769331903
• The cube root of 27991356840 is 3036.2764906213

Scales and comparisons

• 27,991,356,840 seconds is equal to 890 years, 2 weeks, 54 minutes.
• To count from 1 to 27,991,356,840 would take you about one thousand, seven hundred eighty years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 27991356840 cubic inches would be around 253 feet tall.

Recreational maths with 27991356840

• 27991356840 backwards is 04865319972
• 27991356840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 27991356840's digits is 54
• More coming soon!